I feel it's most likely the alpha-yohimbine. Even though it's more tolerated than Yohimbine hcl it can still effect some unfavorably.

I can handle Alpha-Y, but not hcl. I remember I got a bottle of Hot Rox a long time ago when I foolishly bought over priced products from Biotest. Tried to tough out half the bottle feeling like ass every time I took a dose before giving it to a friend.

I thought that after spending sometime sifting through some!! No doubt PES produce great supplements, unfortunately for me I don't react well to an ingredient! Definitely be giving SHIFT+Erase(pro?) a try at some point in the near future.

Had oats for breakfast this morning and took 1cap AT-2 with my protein shake...although I still have slight runny nose and bit of tension in my head, I've found taking along with food is much better for me. Sides that I encountered yesterday have certainly been minimized, and I felt great doing cardio this morning